M. G. Sosonkin

National Academy of Sciences of Ukraine | ISP · Main Astronomical Observatory

The Aerosol-UA space mission will study aerosol microphysical characteristics in the Earth’s atmosphere based on the multispectral scanning polarimeter (ScanPol) and imaging polarimeter (MSIP). Both polarimeters must be precisely calibrated on the ground and in orbit to provide correct measurements. This paper considers the results of developing an...

The concept of a device for the radiometric calibration of photometers or polarimeters on the Earth orbit using the Sun is considered. The shortcomings and advantages for the designing and materials of the key elements are analyzed. The illumination conditions are determined for the working element of the radiometric calibration assembly of the Sca...

Extraordinarily high aerosol contamination was observed in the atmosphere over the city of Kyiv, Ukraine, during the March–April 2020 period. The source of contamination was the large grass and forest fires in the northern part of Ukraine and the Kyiv region. The level of PM2.5 load was investigated using newly established AirVisual sensor mini-net...

Extraordinary high aerosol contamination observed in the atmosphere over Kyiv city, Ukraine, during the March – April 2020 period. The source of contamination was the large grass and forest fires in the northern part of Ukraine and the Kyiv region. The level of PM2.5 load investigated using newly established AirVisual sensors mini-network in five a...

In this paper, the scan mirror assembly for the space experiment Aerosol-UA scanning polarimeter (ScanPol) is described. The aim of the Ukrainian space mission Aerosol-UA is to create a database of the optical characteristics of aerosol and cloud particles in the Earth’s atmosphere over a long period of time. The optical characteristics of aerosol...

The instruments state-of-art for Ukrainian space project Aerosol-UA is presented. The instruments are designed for study the terrestrial atmospheric aerosol spatial distribution and microphysics to quantify the aerosol contribution to the climate change. The aerosol remote sensing concept of the project is based on precise orbital measurements by t...

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We present the results of the development of a representational model of the multispectral polarization state analyzer of the ScanPol scanning polarimeter for the space experiment Aerosol-UA. e aim of the Ukrainian space mission Aerosol-UA is to create a database based on continuous satellite measurements of the optical characteristics of aerosol a...

Aerosol-UA satellite mission for the polarimetric study of aerosols in the atmosphere: current status and prospects Yaroslav S. Yatskiv, Oleksandr V. Degtyarev, Ivan I. Syniavskyi, Gennadii P. Milinevskyi*, Mikhail G. Sosonkin, Vassyl O. Danylevsky, Yevgen A. Oberemok, Andrii P. Bovchaliuk, Janna M. Dlugach, Ihor V. Fesianov, and Yury S. Ivanov M...

Multispectral imager-polarimeter of the "AEROSOL-UA" space project Heading: Space Instruments 1Syniavskyi, II, 1Ivanov, Yu.S, 1Sosonkin, MG, 2Milinevsky, GP, 1Koshman, G 1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine 2Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv...

Aerosol properties in atmosphere over Kyiv using lidar and sun-photometer observations (1) Bovchaliuk V., (1, 2) Milinevsky G., (1) Danylevsky V., (3) Goloub Ph., (2) Sosonkin M., (2) Yukhimchuk Yu., (3) Podvin T. (1) Taras Shevchenko National University of Kyiv, Kyiv, Ukraine (2) Main Astronomical Observatory of the National Academy of Sciences...

At various space experiments it is necessary to plan carrying out parallel terrestrial observations. For this purpose spectropolarimeter of support of Space experiments in spectral range of 350-900 nm was developed and manufactured at the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. As a dispersing system of SPS it...

We discuss the development of the Ukrainian space project Aerosol-UA which has the following three main objectives: (1) to monitor the spatial distribution of key characteristics of terrestrial tropospheric and stratospheric aerosols; (2) to provide a comprehensive observational database enabling accurate quantitative estimates of the aerosol contr...

The distribution and properties of atmospheric aerosols on a global scale are not well known in terms of determination of their eects on climate. This mostly is due to extreme variability of aerosol concentrations, properties, sources, and types. Aerosol climate impact is comparable to the eect of greenhouse gases, but its inuence is more dicult to...

Preparations have been made for the development of the instrumentation suite for the space experiment Aerosol-UA (NAS), in particular, of the polarimeter ScanPol intended for remote-sensing studies of the global distribution of aerosol properties and clouds in the terrestrial atmosphere by means of polarimetric and spectral measurements of the scat...

The development of the Ukrainian space project Aerosol-UA which has the following three main objectivesis discussed. The remote sensing concept of the project is based on precise orbital measurements of the intensity and polarization of sunlight scattered by the atmosphere and the surface by a scanning polarimeter accompanied by a wide-angle panora...

The paper presents an investigation of aerosol seasonal variations in several urban–industrial regions in Ukraine. Our analysis of seasonal variations of optical and physical aerosol parameters is based on the sun-photometer 2008–2013 data from two urban ground-based AERONET (AErosol RObotic NETwork) sites in Ukraine (Kyiv, Lu-gansk) as well as on...

Abstract. The paper presents an investigation of aerosol seasonal variations in several urban sites in the East European region. Our analysis of seasonal variations of optical and physical aerosol parameters is based on the sun-photometer 2008–2012 data from three urban ground-based AERONET sites in Ukraine (Kyiv, Kyiv-AO, and Lugansk) and one site...

full text: http://www.atmos-chem-phys.net/13/6587/2013/acp-13-6587-2013.html http://www.atmos-chem-phys.net/13/6587/2013/acp-13-6587-2013-supplement.pdf

The paper presents some results of the study on aerosol variability in the period from 2003 to 2011 over the Eastern Europe region, with latitude ranging from 40° N to 60° N and longitude from 20° E to 50° E. The analysis was based on the POLDER/PARASOL and POLDER-2/ADEOS satellites and AERONET (AErosol RObotic NETwork) ground-based sun photometer...

The paper presents the study of aerosol variability in the period from 2003 to 2011 over Eastern Europe region with latitude ranging from 40° N to 60° N and longitude from 20° E to 50° E. The analysis was based on the POLDER/PARASOL and POLDER-2/ADEOS satellites and AERONET ground-based sunphotometer observations. The aerosol optical thickness (AOT...

Atmospheric aerosols and their impact on climate study are based on measurements by networks of ground-based instruments, satellite sensors, and measurements on portable sunphotometers. This paper presents the preliminary aerosol characteristics obtained during 2009-2012 using portable multi-wavelength Microtops II sunphotometer. Measurements were...

Dobson spectrophotometer total ozone content (TOC) and Umkehr observations in Kyiv have been started for the first time in Ukraine in May, 2010. Joint team of scientists is providing TOC and Umkehr measurements in a new site registered in WOUDC as Kyiv-Goloseyev STN498 and with GAWID 'KGV' in the GAWSIS. The station has been included in Global Atmo...

In recent years the Joint Laboratory of Atmospheric Optics and Aerosols of Ukraine has been carrying out atmospheric research in cooperation with international program of climate change studies. Our current research is aimed at studying aerosol and ozone in the Earth's atmosphere, because these constituents have a substantial influence on climate....

Regular aerosol optical properties measurements by sunphotometers CE318 according AERONET program have been started in Ukraine since 2007 in Sevastopol. In April 2008 the permanent AERONET/PHOTONS site has been established in Kyiv. The mobile site with sunphotometers 318N and Microtops II for measurements in other Ukraine regions provided aerosol o...

The comparison is represented of the results of surface ozone concentration measurements in two megalopolises, Moscow and Kiev. A temporal course of ozone concentration and temperature in both cities is close by the shape and is typical of medium-polluted plain stations. In both megalopolises, two maxima are observed within the seasonal ozone conce...

The AErosol RObotic NETwork (AERONET) is one of the most developed ground-based networks for aerosol monitoring. Radiative measurements (solar irradiance extinction, aureole brightness and sky light polarization) are used by the AERONET inversion retrieval technique to derive a wide variety of aerosol particle properties and parameters that are imp...

The atmospheric composition changes have a great influence on the global environment. To obtain a wide picture of the present-day state of the atmosphere, it is necessary to provide adequate monitoring of its gaseous and other components. The National Academy of Sciences of Ukraine continues to exert its efforts to develop an air monitoring network...

The PHOTONS network, as a part of the AERONET ground network for aerosol remote sensing of Earth’s atmosphere, covers more than 40 sites in Europe, Africa and Asia, providing sun-photometer measurements, calibration and data processing. Within the framework of scientific cooperation between the Lille 1 and the National Taras Shevchenko Kyiv Univers...

The analysis of ozone mixing ratios measured at urban and rural sites in Ukraine was focused on investigation of diurnal and seasonal variability of ground-level ozone, as well as on studying the influence of meteorological variables on ozone concentration, especially on urban scale. Along with various parameters, the numbers of ozone threshold exc...

We report on ground-based FTIR observations being performed within the framework of the ESA-NIVR-KNMI project 2907 entitled "OMI validation by ground based remote sensing: ozone columns and atmospheric profiles" for the purpose of OMI data validation. FTIR observations were performed during the time frames August-October 2005, June-October 2006 and...

Long-term ozone measurements of two background mountain sites, namely the Kislovodsk High Mountain Station in Caucasus, Russia (KHMS, 43.70° N, 42.70° E, 2070 m a.s.l.) and the Jungfraujoch in Switzerland (JFJ, 46.55° N, 7.98° E, 3580 m a.s.l.) are compared. Despite of more than 1.5 km altitude difference ozone mixing ratios are comparable at JFJ a...

An analysis of the atmospheric transport influence on the seasonal variations and trends of the surface ozone for two mountain sites, namely Kislovodsk High Mountain Station (KHMS) in Caucasus, Russia (43.7°N, 42.7°E, 2070 m asl.) and Jungfraujoch (JFJ) in Switzerland (46.5°N, 7.9°E, 3580 m asl) will be presented. Transport patterns are analyzed us...

The first steps of ozone episode modeling for Kiev city are described. For simulation of ozone concentrations, the Prognostic Meteorological Model (PMM) and Urban Airshed Model (UAM-V) (SAI) are used. The episode of enhanced ozone concentrations for 17 – 21 August 2000 from monitoring data in Kiev Botanic Garden was selected for modeling. The resul...

IR radiation sources are used in a remote path analyzer of the surface atmosphere on the basis of a Fourier spectrometer. The idea is introduced of minimum operating paths on which it is possible to measure the concentrations of the main contaminants at a level of maximum permissible concentrations. The theoretical estimate of such paths is provide...

We justify the advisability of the use of the spektropolarimetric device in preparation for and performance of the space experiments for global continuous long-term control of phenomena on the surface and in the atmosphere of Earth, in circumterrestrial space, on the Moon, on Solar system planets end on other bright celestial objects.

Analysis of the long-term surface ozone records of two mountain sites, namely Kislovodsk High Mountain Station (KHMS) in Caucasus, Russia (43.7°N, 42.7°E, 2070 asl.) and Jungfraujoch (JFJ) in Switzerland (46.5°N, 7.9°E, 3580m asl) will be presented. A strong increase in ozone concentration (up +0.46±0.11ppb/year) was found at JFJ while ozone signif...

It is planned to manufacture the spectropolarimeter to measure the linear polarization of radiation from celestial objects in a spectral region of 350 to 930 nm. The polarimeter will satisfy the following requirements: it will be equipped with panoramic light-receiver; the number of elements and their thickness will be minimized; each optical eleme...

This article proposes layouts of increased-efficiency astronomical spectropolarimeters constructed using the same concept: a UV spectropolarimeter for the range 0.23-0.40 µm and a spectropolarimeter for the visible range 0.4-0.87 µm. It is shown that a limited number of elements can serve the function of optical reducer, dispersive unit, and aberra...

The use of instrumental facilities at the high-altitude Terskol Observatory for the monitoring of events and processes in the atmosphere and outer space is described. The practical results derived from ground-based observations are presented. It is shown that the integrating operational information collected from space and Earth observation platfor...

Ozone research in mountain regions are of the great importance as they provide opportunity to observe background changes of the surface ozone levels. Of the interest are the data of the long-term measurements as they show the long-term changes of ozone concentrations which can be later attributed to the effects of precursors emissions regulations o...

Continuous high-frequency (every minute) automatic measurements of surface ozone concentrations have been made at the high-altitude Terskol Observatory (on the slope of Elbrus mountain, the Northern Caucasus) since 2003. We present the main experimental results including seasonal variations and the main factors affecting ozone levels. Ozone concent...

A procedure for constructing a spectropolarimeter of heightened efficiency is considered. It is shown that a limited number of elements can perform functions of the optical reduction, dispersing block, and aberrations corrector. This approach should be of particular assistance in the case of the UV spectral region, where numerous surfaces of tradit...

The technique and software for modelling the~formation, sinks and transport processes of tropospheric ozone in real meteorological conditions are described. The program UAM-V developed for solving these problems is considered in detail. The results of the total ozone measurements obtained by the infrared Fourier-spectroscopy method and simulated by...

The analysis of atmospheric spectra was carried out using MODTRAN3 code. Fitting of model and observed spectra was accounting variable water absorption and other molecules. The estimates of ozone column density are agreed well with satellite measurements.

The Main Astronomical observatory of the National Academy of Sciences of Ukraine in collaboration with the Institute of Space Investigations of the Russian Academy of Sciences takes part in the International Space Experiment within the framework of the combined program “Planetary monitoring.” We describe the complex of astronomical devices “Digital...

The basic requirement for the optical circuit of spectrometer-polarimeter for investigation of planets are stated. The spectrometer-polarimeter is intended for the equipment of the telescope which is planned to be placed aboard the International Space Station by the ISR of RAS. Based upon the formulated tasks, we discuss the variants for the techni...

On the basis of a experimental laboratory model, the principles of implementation of a hardware-software complex Fourier spectrometry, data collection and processing are compiled and justified. This complex can be used as for the ground based and moving platform observation as for flight experiments. A mathematical algorithm and a program code for...

Based on a laboratory experimental model, we developed the principles of the design for a hardware-software complex of Fourier spectrometer operation, data collection and processing. The Fourier spectrometer is used for flight experiments in view of the requirements of reliability, speed, and energy consumption. The advantages of IBM compatible spe...

We have shown that even now it is possible only by the efforts of Ukrainian enterprises to make compact and vibrostable Fourier spectrometers which can be placed not only in laboratories (stationary and movable), but on the board of artificial satellite of the Earth. The spectrophotometry in thermal region of the spectrum is perspective remote meth...

The sensitivity of FEU-157 photomultipliers with GaAs photocathode in the wavelength range 700 - 900 nm is higher than that of widely used photomultipliers FEU-79. When operated with faint light sources at room temperatures, the FEU-157 noises exceed the useful signal. The noises can be reduced by cooling the photocathode. A device for studying the...

A method and a pack of application programs have been developed for the computer simulation of the statistical processes of electron multiplication in an electrooptic transducer. It is shown that a reliable isolation of a single-electron peak on the display is possible only with an output recorder of sufficient sensitivity. The dispersion of the ga...

Technical description of the control unit and its functional capabilities are reported.

A multipurpose camera with an image-tube for astronomical photography has been designed at the Main Astronomical Observatory of the Ukrainian SSR Academy of Sciences. The block diagram of the camera is given. First observations with the camera have been made.

The main requirements are considered for a high-voltage power source of an image-tube used in astronomical investigations. The parameters, description and circuit diagram of the source as well as the analysis of full-scale tests are given.